2017
DOI: 10.1039/c7cp03188b
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Investigating synergistic interactions of group 4, 5 and 6 metals with gold nanoparticles for the catalysis of the electrochemical hydrogen evolution reaction

Abstract: An investigation of the catalysis of the electrochemical hydrogen evolution reaction (HER, 2H + 2e → H) in aqueous 0.5 M HSO electrolyte using composites consisting of gold nanoparticles (Au), carbon (Black Pearl 2000) and group 4, 5, and 6 metals is presented. This study is a continuation of our earlier work (Phys. Chem. Chem. Phys., 2016, 18, 21548-21553) on molybdenum and Au, which we found to interact synergistically to enhance the HER. We demonstrate here that tungsten not only also showed synergy with Au… Show more

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Cited by 3 publications
(3 citation statements)
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“…As for the detailed pathway for CO spillover from Ag to Cu, here we propose two synergistic routes: (1) CO produced on Ag nanoparticles first desorbs into the electrolyte, followed by readsorbing on the vicinal Cu sites; (2) *CO that adsorbed on Ag directly diffuses through the boundaries of Ag and Cu, and transfers to Cu sites. The latter spillover pathway is more commonly studied for *H spillover in electrochemical hydrogen evolution. , Here, in our system, the number of Ag sites adjacent to Cu is much less compared to the sum of active Ag sites. Considering that CuAg delivers a remarkable CO spillover efficiency, the majority of CO is likely to spillover via the former pathway.…”
Section: Resultsmentioning
confidence: 64%
See 1 more Smart Citation
“…As for the detailed pathway for CO spillover from Ag to Cu, here we propose two synergistic routes: (1) CO produced on Ag nanoparticles first desorbs into the electrolyte, followed by readsorbing on the vicinal Cu sites; (2) *CO that adsorbed on Ag directly diffuses through the boundaries of Ag and Cu, and transfers to Cu sites. The latter spillover pathway is more commonly studied for *H spillover in electrochemical hydrogen evolution. , Here, in our system, the number of Ag sites adjacent to Cu is much less compared to the sum of active Ag sites. Considering that CuAg delivers a remarkable CO spillover efficiency, the majority of CO is likely to spillover via the former pathway.…”
Section: Resultsmentioning
confidence: 64%
“…The latter spillover pathway is more commonly studied for *H spillover in electrochemical hydrogen evolution. 52,53 Here, in our system, the number of Ag sites adjacent to Cu is much less compared to the sum of active Ag sites. Considering that CuAg delivers a remarkable CO spillover efficiency, the majority of CO is likely to spillover via the former pathway.…”
Section: Resultsmentioning
confidence: 96%
“…We have also considered if the two-site mechanistic model, which we proposed in our previous work using Mo and Au composite catalysts, could be operating here. , This model required one site to facilitate the proton discharge step and consequently acting as a reservoir of H ad and the other site to play the role of recombination center. However, the adsorption energies of hydrogen on Ru and W are strong, −0.61 (Table ) and −0.7 eV, respectively .…”
Section: Resultsmentioning
confidence: 99%