Ruthenium (Ru) has been theoretically considered a viable alkaline hydrogen evolution reaction electrocatalyst due to its fast water dissociation kinetics. However, its strong affinity to the adsorbed hydroxyl (OHad) blocks the active sites, resulting in unsatisfactory performance during the practical HER process. Here, we first reported a competitive adsorption strategy for the construction of SnO2 nanoparticles doped with Ru single-atoms supported on carbon (Ru SAs-SnO2/C) via atomic galvanic replacement. SnO2 was introduced to regulate the strong interaction between Ru and OHad by the competitive adsorption of OHad between Ru and SnO2, which alleviated the poisoning of Ru sites. As a consequence, the Ru SAs-SnO2/C exhibited a low overpotential at 10 mAcm2 (10 mV) and a low Tafel slope of 25 mVdec1. This approach provides a new avenue to modulate the adsorption strength of active sites and intermediates, which paves the way for the development of highly active electrocatalysts.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:89143 |
| Date | 19 January 2024 |
| Creators | Zhang, Jiachen, Chen, Guangbo, Liu, Qicheng, Fan, Chuang, Sun, Dongmei, Tang, Yawen, Sun, Hanjun, Feng, Xinliang |
| Publisher | Wiley-VCH GmbH |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 1521-3773, e202209486, 10.1002/anie.202209486, info:eu-repo/grantAgreement/Jiangsu Specially Appointed Professorship/National Key R&D Program of China/2021YFA1502700/, info:eu-repo/grantAgreement/Europäische Union/Horizon2020/3:881603//Graphene Flagship Core Project 3/GrapheneCore3 |
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