New insights into HER catalysis: The effect of nano-silica support on catalysis by silver nanoparticles

Gifty Sara Rolly; Dan Meyerstein; Guy Yardeni; Ronen Bar-Ziv; Tomer Zidki

doi:10.1039/c9cp06820a

New insights into HER catalysis: The effect of nano-silica support on catalysis by silver nanoparticles

Gifty Sara Rolly, Dan Meyerstein, Guy Yardeni, Ronen Bar-Ziv, Tomer Zidki

Ben-Gurion University of the Negev, Ariel University

Research output: Contribution to journal › Article › peer-review

Abstract

Supported metal catalysts have recently attracted considerable attention in the field of catalysis. The effect of surface chemical groups (SiO^-/SiOH₂⁺) on SiO₂-Ag⁰-NPs along with the average negative charge induced by (CH₃)₂COH radicals on the catalytic reduction of H₂O/H₃O⁺ towards the hydrogen evolution reaction (HER) is reported. The results indicate that similar effects are observed both above and below the point of zero charge (PZC) of silica. More importantly, it is shown that a high concentration of this catalyst does not necessarily contribute to boosting the hydrogen formation, but instead, the density of charge on its surface is a decisive factor. A mechanistic explanation of the observed effect is given.

Original language	American English
Pages (from-to)	6401-6405
Number of pages	5
Journal	Physical Chemistry Chemical Physics
Volume	22
Issue number	11
DOIs	https://doi.org/10.1039/c9cp06820a
State	Published - 21 Mar 2020

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SDG 7 Affordable and Clean Energy

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1039/c9cp06820a

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title = "New insights into HER catalysis: The effect of nano-silica support on catalysis by silver nanoparticles",

abstract = "Supported metal catalysts have recently attracted considerable attention in the field of catalysis. The effect of surface chemical groups (SiO-/SiOH2+) on SiO2-Ag0-NPs along with the average negative charge induced by (CH3)2COH radicals on the catalytic reduction of H2O/H3O+ towards the hydrogen evolution reaction (HER) is reported. The results indicate that similar effects are observed both above and below the point of zero charge (PZC) of silica. More importantly, it is shown that a high concentration of this catalyst does not necessarily contribute to boosting the hydrogen formation, but instead, the density of charge on its surface is a decisive factor. A mechanistic explanation of the observed effect is given.",

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T2 - The effect of nano-silica support on catalysis by silver nanoparticles

AU - Rolly, Gifty Sara

AU - Meyerstein, Dan

AU - Yardeni, Guy

AU - Bar-Ziv, Ronen

AU - Zidki, Tomer

PY - 2020/3/21

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AB - Supported metal catalysts have recently attracted considerable attention in the field of catalysis. The effect of surface chemical groups (SiO-/SiOH2+) on SiO2-Ag0-NPs along with the average negative charge induced by (CH3)2COH radicals on the catalytic reduction of H2O/H3O+ towards the hydrogen evolution reaction (HER) is reported. The results indicate that similar effects are observed both above and below the point of zero charge (PZC) of silica. More importantly, it is shown that a high concentration of this catalyst does not necessarily contribute to boosting the hydrogen formation, but instead, the density of charge on its surface is a decisive factor. A mechanistic explanation of the observed effect is given.

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New insights into HER catalysis: The effect of nano-silica support on catalysis by silver nanoparticles

Abstract

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