Boosting the Water Gas Shift Reaction Rate on Au Nanocatalysts through Collaborative Synthesis of Warm and Cold Plasmas

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2025-01-02 DOI:10.1021/acscatal.4c05657

Ye-Cheng Li, Xiao-Song Li, Jing-Lin Liu, Bin Zhu, Guanghui Zhang, Dongdong Liu, Wei Liu, Xinwen Guo, Ai-Min Zhu

引用次数: 0

Abstract

TiO₂-supported Au nanocatalysts are highly attractive for the water gas shift (WGS) reaction due to their high catalytic activity at low temperatures. Herein, the (Au/TiO_2–x)_OP catalyst synthesized by the combination of warm and cold plasmas exhibits a high WGS reaction rate of 1.63 mol·g_Au^–1·h^–1 at 120 °C, being one of the highest WGS rates among Au/TiO₂ catalysts. The warm plasma generates a large amount of oxygen vacancies, while the cold plasma treatment generates small Au nanoparticles and interfacial sites. The (Au/TiO_2–x)_OP catalyst features two kinds of abundant active sites including Au^δ+-O^δ−-Ti⁴⁺ and Au⁰-O_v-Ti³⁺, which accelerate the WGS reaction simultaneously along the intermediate and redox reaction pathways, respectively.

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冷热等离子体协同合成提高金纳米催化剂上水气转换反应速率

二氧化钛负载的金纳米催化剂由于其在低温下的高催化活性，在水煤气转换（WGS）反应中具有很高的吸引力。其中，冷热等离子体结合合成的（Au/TiO2 - x）OP催化剂在120℃下WGS反应速率高达1.63 mol·gAu-1·h-1，是Au/TiO2催化剂中WGS速率最高的催化剂之一。热等离子体产生大量的氧空位，而冷等离子体处理产生小的金纳米颗粒和界面位点。（Au/ TiO2-x）OP催化剂具有Auδ+-Oδ−-Ti4+和Au0-Ov-Ti3+两种丰富的活性位点，分别沿中间反应和氧化还原反应途径同时加速WGS反应。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.