期刊
ACS CATALYSIS
卷 7, 期 10, 页码 7141-7145出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.7b02292
关键词
catalytic reduction; electrostatics; nanoparticles; surface chemistry; substrate channeling
资金
- DST-SERB India [EMR/2015/001561]
- UGC
- MHRD
The potency of electrostatic effects arising from nanoparticle (NP) surface in Au-NP-catalyzed reduction of charged substrates are presented. The electrostatic potential around Au NPs is controlled by varying the nature of ligands and ionic strength of the medium. Favorable interactions arising from the attraction between oppositely charged Au NP and substrates results in the channeling of substrates to the NP surface, which in turn enhances the catalytic reduction. The positively charged ([+]) Au NP outperformed other NP systems despite having comparable or even lower surface area for adsorption, proving the exclusivity of electrostatics in catalysis. At least an order of magnitude higher concentration of negatively charged ([-]) Au NP is required to compete with the catalytic activity of [+] Au NP.
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