DataVXACS Applied Energy MaterialsPaper
journal article·2020-03-23

Insights into the Formation, Chemical Stability, and Activity of Transient NiyP@NiOx Core–Shell Heterostructures for the Oxygen Evolution Reaction

Patrick Wilde, Stefan Dieckhöfer, Thomas Quast, Weikai Xiang, Anjali Bhatt, Yen-Ting Chen, Sabine Seisel, Stefan Barwe, Corina Andronescu, Tong Li, Wolfgang Schuhmann, Justus Masa

ACS Applied Energy Materials· Volume 3· Issue 3
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Source abstract

Abstract

NiyP emerged as a highly active precatalyst for the alkaline oxygen evolution reaction where structural changes play a crucial role for its catalytic performance. We probed the chemical stability of NiyP in 1 M KOH at 80 °C and examined how exposure up to 168 h affects its structure and catalytic performance. We observed selective P-leaching and formation of NiyP/NiOx core–shell heterostructures, where shell thickness increases with ageing time, which is detrimental for the activity. By tuning the particle size, we demonstrate that prevention of complete catalyst oxidation is essential to preserve the outstanding electrochemical performance of NiyP in alkaline media.
Source: openalex_inverted_index · Quality: baseline

Research context

Catalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Advanced Memory and Neural Computing

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

Affiliations

Analytical Chemistry—Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany

Institute for Materials & ZGH, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44801 Bochum, Germany

Center for Solvation Science (ZEMOS), Ruhr-Universität Bochum, Universitätsstr. 150, D-44801 Bochum, Germany

Chemical Technology III, Faculty of Chemistry and CENIDE (Center for Nanointegration), University Duisburg Essen, Carl-Benz-Strasse 199; D-47057 Duisburg, Germany

Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36; D-45470 Mülheim an der Ruhr, Germany

Funding

Deutsche Forschungsgemeinschaft · Max-Planck-Gesellschaft · Verband der Chemischen Industrie

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