Bimetallic NiWO4 as an Efficient Interface Modulator for Pd Towards Enhanced Alcohol Electro-oxidation

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2024-02-12 DOI:10.1007/s12678-024-00863-0

Roshima Kottayintavida, Dipannita Ganguly, Nishanth Karimbintherikkal Gopalan

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Abstract

The electronic coupling effect by interfacial engineering between noble metal and transition metal tungstates is considered an effective strategy for improving electrocatalytic activity. Herein we introduced a new hybrid electrocatalyst consisting of Pd nanoparticle supported on NiWO₄ nanocrystals modified carbon for efficient alcohol electro-oxidation reaction. Bimetallic oxide resulted as an efficient interface modulator for Pd over mono metallic oxides. The synthesised catalyst, Pd over nickel tungstate modified Vulcan, exhibited well-dispersed homogeneous Pd particles. The catalytic effectiveness for the electro-oxidation of methanol and ethanol was found to be enhanced around ten times (1202.48 mA/mg_Pd) and six times (1508.24 mA/mg_Pd), respectively compared to Pd deposited over C catalyst. The enhanced electrochemical property owing to electronic modification and improved surface area, by the strong coupling of Pd with nickel tungstate and carbon support conferred excellent catalytic performance for the synthesised catalyst.

Graphical Abstract

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双金属 NiWO4 作为钯的高效界面调制器，用于增强酒精电氧化作用

摘要通过贵金属和过渡金属钨酸盐之间的界面工程而产生的电子耦合效应被认为是提高电催化活性的有效策略。在此，我们介绍了一种新型混合电催化剂，该催化剂由支撑在 NiWO4 纳米晶修饰碳上的钯纳米粒子组成，可用于高效的酒精电氧化反应。双金属氧化物是钯在单金属氧化物上的有效界面调节剂。在钨酸镍修饰的 Vulcan 上合成的催化剂 Pd 表现出均匀的 Pd 颗粒。与沉积在 C 催化剂上的钯相比，甲醇和乙醇电氧化的催化效率分别提高了约 10 倍（1202.48 mA/mgPd）和 6 倍（1508.24 mA/mgPd）。由于钯与钨酸镍和碳载体的强耦合作用，电子改性和表面积的改善增强了电化学性能，从而使合成催化剂具有优异的催化性能。图表摘要

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

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