journal article·2020-09-11

Activity–Stability Relationship in Au@Pt Nanoparticles for Electrocatalysis

Dong Young Chung, Subin Park, Hyeonju Lee, Hyungjun Kim, Young-Hoon Chung, Ji Mun Yoo, Docheon Ahn, Seung-Ho Yu, Kug-Seung Lee, Mahdi Ahmadi, Huanxin Ju, Héctor D. Abruña, Sung Jong Yoo, Bongjin Simon Mun, Yung-Eun Sung

ACS Energy Letters· Volume 5· Issue 9
Publisher page

Abstract

Despite breakthroughs in the activity of electrocatalysts for the oxygen reduction reaction (ORR), the development of nanoscale ORR electrocatalysts is still hindered by their instability. Here, to bridge the functional link between activity and stability, well-controlled Au@Pt (core@shell) nanoparticles are investigated. In situ monitoring of atomic dissolution and physicochemical analysis in conjunction with theoretical calculations reveal that the atomic-level stability of Au@Pt nanoparticle is attributed to the low surface coverage of OH and oxide on Pt, balancing between strain and ligand effect of Au at the interface. Considering the relationships in activity–stability–oxophilicity, the functional links between activity and stability in the ORR are discussed, and the regulation of oxophilicity is suggested as a guideline for designing highly active and durable electrocatalysts for fuel cell applications.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea

School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul 08826, Republic of Korea

Department of Physics & Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea

Department of Chemistry and Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea

Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea

Pohang Accelerator Laboratory(PAL), Pohang University of Science and Technology, Pohang 37673, Republic of Korea

Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro Seongbuk-gu, Seoul 02841, Republic of Korea

Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China

Center for Hydrogen Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic of Korea

Funding

National Research Foundation of Korea · Gwangju Institute of Science and Technology · Institute for Basic Science

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