Exploring the Role of Multi-Catalytic Sites in an Amorphous Co-W-B Electrocatalyst for Hydrogen and Oxygen Evolution Reactions
- Title
- Exploring the Role of Multi-Catalytic Sites in an Amorphous Co-W-B Electrocatalyst for Hydrogen and Oxygen Evolution Reactions
- Creator
- Chunduri A.; Bhide A.; Gupta S.; Mali K.H.; Bhagat B.R.; Dashora A.; Spreitzer M.; Fernandes R.; Patel R.; Patel N.
- Description
- Amorphous materials are used in multitude of catalytic applications, including electrocatalytic water-splitting. Identification and investigation of active sites in amorphous catalysts are rarely reported, mainly owing to the complexity of the systems. Herein, we report an amorphous bifunctional Co-W-B electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The optimized Co-W-B catalyst showed promising overpotential values of 97 mV (HER) and 292 mV (OER), respectively, to achieve 10 mA cm-2 in 1 M KOH, with good stability. The promoting effect of W in Co-B was investigated experimentally, while computational tools were used to identify all the possible catalytic sites in an amorphous Co-W-B model and classify the most preferred sites for HER and OER. The presence of multi-catalytic sites with specific selectivity toward HER and OER was observed, which explained the bifunctional activity of Co-W-B. This study will foster better understanding of the origin of catalytic activity in similar amorphous systems. 2023 The Authors. Published by American Chemical Society.
- Source
- ACS Applied Energy Materials, Vol-6, No. 9, pp. 4630-4641.
- Date
- 2023-01-01
- Publisher
- American Chemical Society
- Subject
- amorphous metal boride; bifunctional catalyst; hydrogen evolution reaction; multi-catalytic sites; oxygen evolution reaction
- Coverage
- Chunduri A., Department of Physics, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India; Bhide A., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Gupta S., Advanced Materials Department, Joef Stefan Institute, Ljubljana, 1000, Slovenia; Mali K.H., Physics Department, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, India; Bhagat B.R., Physics Department, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, India; Dashora A., Physics Department, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, India; Spreitzer M., Advanced Materials Department, Joef Stefan Institute, Ljubljana, 1000, Slovenia; Fernandes R., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Patel R., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Patel N., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India
- Rights
- All Open Access; Hybrid Gold Open Access
- Relation
- ISSN: 25740962
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Chunduri A.; Bhide A.; Gupta S.; Mali K.H.; Bhagat B.R.; Dashora A.; Spreitzer M.; Fernandes R.; Patel R.; Patel N., “Exploring the Role of Multi-Catalytic Sites in an Amorphous Co-W-B Electrocatalyst for Hydrogen and Oxygen Evolution Reactions,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 27, 2025, https://archives.christuniversity.in/items/show/14228.