Cu Modified Pt Nanoflowers with Preferential (100) Surfaces for Selective Electroreduction of Nitrate

被引：25

作者：

Chen, Ting ^{[1
]}

Li, Yuxuan ^{[1
]}

Li, Luyan ^{[1
]}

Zhao, Yanjie ^{[1
]}

Shi, Shuhua ^{[1
]}

Jiang, Rongyan ^{[2
]}

Ma, Houyi ^{[3
]}

机构：

[1] Shandong Jianzhu Univ, Sch Sci, Jinan 250101, Shandong, Peoples R China

[2] Shandong Jianzhu Univ, Sch Mat Sci & Engn, Jinan 250101, Shandong, Peoples R China

[3] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China

来源：

CATALYSTS | 2019年 / 9卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Pt nanoflowers; preferential (100) orientation; Cu modification; electrocatalysts; nitrate electroreduction; ELECTROCATALYTIC REDUCTION; ELECTROCHEMICAL REDUCTION; COPPER ELECTRODES; SINGLE-CRYSTALS; PLATINUM NANOPARTICLES; PT(100); NITRITE; POLYCRYSTALLINE; IDENTIFICATION; DEPOSITION;

D O I：

10.3390/catal9060536

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Improving surface selectivity and maximizing electrode surface area are critical needs for the electroreduction of nitrate. Herein, preferential (100) oriented Pt nanoflowers with an extended surface area were prepared by potentiostatic deposition on carbon cloth (Pt NFs/CC), and then Cu atoms were adsorbed on the Pt NFs (Cu/Pt NFs/CC) for application of nitrate electroreduction. The results reveal that Cu/Pt NFs/CC with 8.7% Cu coverage exhibits a high selectivity for nitrate electroreduction to N-2 following two steps: Nitrate firstly converts into nitrite on Cu sites adsorbed on Pt NFs, then nitrite subsequently selective reduction and ammonia oxidation to N-2 occur on the large exposed (100) terraces in Pt NFs. In addition, electrocatalytic activity and selectivity of nitrate reduction strongly rely on the Cu surface coverage on Pt NFs, the lower activity of nitrate reduction is displayed with increase of Cu coverage. Accordingly, the selective reduction of nitrate to N-2 is feasible at such nanostructured Pt nanoflowers modified with Cu.

引用

页数：10

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