Journal
ACS APPLIED ENERGY MATERIALS
Volume 4, Issue 6, Pages 5403-5407Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c01265
Keywords
electrochemistry; 2D material; coordination nanosheet; electrocatalyst; hydrogen evolution reaction
Funding
- JST CREST [JPMJCR15F2]
- JSPS KAKENHI [JP19H05460]
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Bis(diimino)metal (MDI) nanosheets (M = Ni, Co, Cu) are synthesized quickly on ITO, GC, and CP by electro-oxidation, showing high crystallinity and electrocatalytic activity. Among coordination nanosheet (CONASH) catalysts, NiDI exhibits the lowest overpotential for hydrogen evolution reaction.
Bis(diimino)metal (MDI) nanosheets (M = Ni, Co, Cu) are synthesized within a few minutes on indium tin oxide (ITO), glassy carbon (GC), and carbon paper (CP) by electro-oxidation of an aqueous solution of metal ions, hexaaminobenzene trihydrochloride, and ammonia. Thin films of these materials are firmly immobilized directly on the substrate. Their PXRD patterns are similar to those prepared by chemical oxidation, indicating considerable crystallinity. Electrocatalytic activities of MDIs on GC in hydrogen evolution reaction were investigated using rotating disk voltammetry. NiDI affords the lowest overpotential for HER among known coordination nanosheet (CONASH) catalysts and offers high catalytic robustness.
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