Identifying Electrocatalytic Sites of the Nanoporous Copper–Ruthenium Alloy for Hydrogen Evolution Reaction in Alkaline Electrolyte
Source abstract
Abstract
Hydrogen production from electrochemical water splitting is a promising route to pursue clean and sustainable energy sources. Here, a three-dimensional nanoporous Cu-Ru alloy is prepared as a high-performance platinum-free catalyst for hydrogen evolution reaction (HER) by a dealloying process. Significantly, the optimized nanoporous alloy Cu53Ru47 exhibits remarkable catalytic activity for HER with nearly zero onset overpotential and ultralow Tafel slopes (∼30 and ∼35 mV dec-1) in both alkaline and neutral electrolytes, achieving a catalytic current density of 10 mA cm-2 at low overpotentials of ∼15 and ∼41 mV, respectively. Operando X-ray absorption spectroscopy experiments, in conjunction with DFT simulations, reveal that the incorporation of Ru atoms into the Cu matrix not only accelerates the reaction step rates of water adsorption and activation but also optimizes the hydrogen bonding energy on Cu and Ru active sites, improving the intrinsic activity for HER.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Nanoporous metals and alloys · Electrocatalysts for Energy Conversion · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
Department of Physics, Shanghai Polytechnic University, Shanghai 201209, China
Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Inorganic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
Funding
State Key Laboratory of Powder Metallurgy · Ministry of Education of the People's Republic of China · National Natural Science Foundation of China · Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research · Youth 1000 Talent Program of China
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