Grain-Boundary-Dependent CO2 Electroreduction Activity

被引：601

作者：

Feng, Xiaofeng ^{[1
]}

Jiang, Kaili ^{[2
,3
]}

Fan, Shoushan ^{[2
,3
]}

Kanan, Matthew W. ^{[1
]}

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[3] Tsinghua Univ, Tsinghua Foxconn Nanotechnol Res Ctr, Beijing 100084, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2015年 / 137卷 / 14期

基金：

美国国家科学基金会;

关键词：

CARBON NANOTUBE ARRAYS; SINGLE-CRYSTAL FACES; AU NANOPARTICLES; ELECTROCHEMICAL CHARACTERIZATION; UNDERPOTENTIAL DEPOSITION; GOLD NANOPARTICLES; REDUCTION; METAL; ELECTROCATALYSIS; CATALYSTS;

D O I：

10.1021/ja5130513

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Uncovering new structure-activity relationships for metal nanoparticle (NP) electrocatalysts is crucial for advancing many energy conversion technologies. Grain boundaries (GBs) could be used to stabilize unique active surfaces, but a quantitative correlation between GBs and catalytic activity has not been established. Here we use vapor deposition to prepare Au NPs on carbon nanotubes (Au/CNT). As deposited, the Au NPs have a relatively high density of GBs that are readily imaged by transmission electron microscopy (TEM); thermal annealing lowers the density in a controlled manner. We show that the surface-area-normalized activity for CO2 reduction is linearly correlated with GB surface density on Au/CNT, demonstrating that GB engineering is a powerful approach to improving the catalytic activity of metal NPs.

引用

收藏

页码：4606 / 4609

页数：4

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