K. Andreas Friedrich

20.2k total citations · 3 hit papers
455 papers, 16.4k citations indexed

About

K. Andreas Friedrich is a scholar working on Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment and Materials Chemistry. According to data from OpenAlex, K. Andreas Friedrich has authored 455 papers receiving a total of 16.4k indexed citations (citations by other indexed papers that have themselves been cited), including 299 papers in Electrical and Electronic Engineering, 191 papers in Renewable Energy, Sustainability and the Environment and 156 papers in Materials Chemistry. Recurrent topics in K. Andreas Friedrich's work include Fuel Cells and Related Materials (216 papers), Electrocatalysts for Energy Conversion (176 papers) and Advancements in Solid Oxide Fuel Cells (107 papers). K. Andreas Friedrich is often cited by papers focused on Fuel Cells and Related Materials (216 papers), Electrocatalysts for Energy Conversion (176 papers) and Advancements in Solid Oxide Fuel Cells (107 papers). K. Andreas Friedrich collaborates with scholars based in Germany, Canada and United States. K. Andreas Friedrich's co-authors include Ulrich Stimming, Linda Carrette, Aldo Saul Gago, Norbert Wagner, Renate Hiesgen, Mathias Schulze, Pawel Gazdzicki, Natalia A. Cañas, Tobias Morawietz and Philipp Lettenmeier and has published in prestigious journals such as Physical Review Letters, Angewandte Chemie International Edition and Nature Communications.

In The Last Decade

K. Andreas Friedrich

440 papers receiving 15.9k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Fuel Cells - Fundamentals and Applications

2001 1.3k citations K. Andreas Friedrich et al. profile →
Fuel Cells: Principles, Types, Fuels, and Applications

2000 691 citations K. Andreas Friedrich et al. profile →
A review of platinum-based catalyst layer degradation in proton exchange membrane fuel cells

2009 534 citations K. Andreas Friedrich et al. profile →

Peers

Countries citing papers authored by K. Andreas Friedrich

Since Specialization

Citations

This map shows the geographic impact of K. Andreas Friedrich's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by K. Andreas Friedrich with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K. Andreas Friedrich more than expected).

Fields of papers citing papers by K. Andreas Friedrich

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by K. Andreas Friedrich. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by K. Andreas Friedrich. The network helps show where K. Andreas Friedrich may publish in the future.

Co-authorship network of co-authors of K. Andreas Friedrich

This figure shows the co-authorship network connecting the top 25 collaborators of K. Andreas Friedrich. A scholar is included among the top collaborators of K. Andreas Friedrich based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with K. Andreas Friedrich. K. Andreas Friedrich is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Degradation mechanisms of a proton exchange membrane water electrolyzer stack operating at high current densities 2025 ·Electrochimica Acta ·(unknown), Tobias Morawietz, Pawel Gazdzicki, Aldo Saul Gago, K. Andreas Friedrich	0
2	Continuous Biological Ex Situ Methanation of CO2 and H2 in a Novel Inverse Membrane Reactor (IMR) 2024 ·Processes ·(unknown), (unknown), (unknown), K. Andreas Friedrich, (unknown), (unknown), (unknown), (unknown), (unknown)	1
3	Effect of high-boiling point solvents on inkjet printing of catalyst layers for proton exchange membrane fuel cells 2024 ·Electrochimica Acta ·Qian Zhao, Tobias Morawietz, Pawel Gazdzicki, K. Andreas Friedrich	2
4	Advanced Impedance Analysis for Performance Degradation during Low-Temperature CO₂ Electroreduction 2024 ·ACS Energy Letters ·(unknown), (unknown), Dennis Kopljar, K. Andreas Friedrich	4
5	On-board hydrogen production from urea via electrolysis to promote low-temperature catalytic reduction of NOx emissions 2024 ·Current Opinion in Electrochemistry ·(unknown), Tobias Morawietz, Aldo Saul Gago, K. Andreas Friedrich	1
6	Experimental and Numerical Investigation of the Low-Frequency Inductive Features in Differential PEMFCs: Ionomer Humidification and Platinum Oxide Effects 2023 ·Journal of The Electrochemical Society ·(unknown), Matthias Hanauer, Ulrich Berner, K. Andreas Friedrich	17
7	Mass transport limitations in concentrated aqueous electrolyte solutions: Theoretical and experimental study of the hydrogen–bromine flow battery electrolyte 2023 ·Electrochimica Acta ·(unknown), (unknown), K. Andreas Friedrich, Jürgen Schumacher	3
8	Degradation Effects at the Porous Transport Layer/Catalyst Layer Interface in Polymer Electrolyte Membrane Water Electrolyzer 2023 ·Journal of The Electrochemical Society ·Chang Liu, Meital Shviro, Guido Bender, Aldo Saul Gago, Tobias Morawietz, Michael J. Dzara, Indro Biswas, Pawel Gazdzicki, Zhenye Kang, Sarah Zaccarine, Svitlana Pylypenko, K. Andreas Friedrich, Marcelo Carmo, Werner Lehnert	47
9	Low-Temperature NO<sub>x</sub> Reduction by H<sub>2</sub> in Diesel Engine Exhaust 2022 ·SAE International Journal of Advances and Current Practices in Mobility ·(unknown), Sven Kureti, (unknown), (unknown), Peter Eilts, Tobias Morawietz, K. Andreas Friedrich, (unknown), Seyed Schwan Hosseiny, (unknown)	5
10	Influence of Cycling onto Electrolyte Distribution Inside a Silver-Based Gas Diffusion Electrode for Zn-Air Batteries 2022 ·ACS Sustainable Chemistry & Engineering ·(unknown), Dennis Kopljar, Norbert Wagner, K. Andreas Friedrich	2
11	Highly active and stable OER electrocatalysts derived from Sr2MIrO6 for proton exchange membrane water electrolyzers 2022 ·Nature Communications ·M. Retuerto, L. Pascual, Jorge Torrero, Mohamed Abdel Salam, A. Tolosana-Moranchel, Diego Gianolio, Pilar Ferrer, Paula Kayser, (unknown), Svenja Stiber, Verónica Celorrio, (unknown), Daniel García Sánchez, Aldo Saul Gago, K. Andreas Friedrich, M.A. Peña, J. A. Alonso, Sergio Rojas	151
12	Evaluation of electrochemical impedance spectra of - batteries (Li-air/Zn-air) for aqueous electrolytes 2021 ·Electrochimica Acta ·(unknown), W. Strunz, Norbert Wagner, K. Andreas Friedrich	22
13	A Segmented Cell Measuring Technique for Current Distribution Measurements in Batteries, Exemplified by the Operando Investigation of a Zn-Air Battery 2021 ·Journal of The Electrochemical Society ·(unknown), Jens Meyer, Dennis Kopljar, Norbert Wagner, K. Andreas Friedrich	3
14	Understanding the Influence of Temperature on Phase Evolution during Lithium‐Graphite (De‐)Intercalation Processes: An Operando X‐ray Diffraction Study 2021 ·ChemElectroChem ·(unknown), (unknown), Norbert Wagner, K. Andreas Friedrich	14
15	Insight into the Mechanisms of High Activity and Stability of Iridium Supported on Antimony-Doped Tin Oxide Aerogel for Anodes of Proton Exchange Membrane Water Electrolyzers 2020 ·ACS Catalysis ·Viktoriia A. Saveleva, (unknown), Olga Kasian, Maria Batuk, Joke Hadermann, Jean‐Jacques Gallet, Fabrice Bournel, Nicolás Alonso‐Vante, (unknown), (unknown), Karl J. J. Mayrhofer, Serhiy Cherevko, Aldo Saul Gago, K. Andreas Friedrich, Spyridon Zafeiratos, Elena R. Savinova	83
16	Toward developing accelerated stress tests for proton exchange membrane electrolyzers 2020 ·Current Opinion in Electrochemistry ·(unknown), Aldo Saul Gago, Pawel Gazdzicki, K. Andreas Friedrich, Michael Wark	71
17	Elucidating the Performance Limitations of Alkaline Electrolyte Membrane Electrolysis: Dominance of Anion Concentration in Membrane Electrode Assembly 2020 ·ChemElectroChem ·Fatemeh Razmjooei, (unknown), Regine Reißner, Aldo Saul Gago, Syed Asif Ansar, K. Andreas Friedrich	47
18	Synthesis and Evaluation of the A-Site Deficient Perovskite La_0.65Sr_0.3Cr_0.85Ni_0.15O_3-δas Fuel Electrode for High Temperature Co-Electrolysis Enhanced by In Situ Exsolution of Ni Nanoparticles 2019 ·ECS Transactions ·(unknown), Guoxing Chen, Anke Weidenkaff, Noriko Sata, Feng Han, (unknown), Rémi Costa, K. Andreas Friedrich	3
19	Highly active nano-sized iridium catalysts: synthesis and operando spectroscopy in a proton exchange membrane electrolyzer 2018 ·Chemical Science ·Philipp Lettenmeier, (unknown), (unknown), Viktoriia A. Saveleva, Spyridon Zafeiratos, Elena R. Savinova, Jean‐Jacques Gallet, Fabrice Bournel, Aldo Saul Gago, K. Andreas Friedrich	96
20	The Influence of Sulfur Formation on Performance and Reforming Chemistry of SOFC Anodes Operating on Methane Containing Fuel 2015 ·Journal of The Electrochemical Society ·Matthias Riegraf, Vitaliy Yurkiv, Günter Schiller, Rémi Costa, Arnulf Latz, K. Andreas Friedrich	15

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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