journal article·2022-06-01

Pt-Anchored CuCrO2 for Low-Temperature-Operating High-Performance H2S Chemiresistors

Ruofan Zhang, Zanhong Deng, Lei Shi, Mahesh Kumar, Junqing Chang, Shimao Wang, Xiaodong Fang, Wei Tong, Gang Meng

ACS Applied Materials & Interfaces· Volume 14· Issue 21
Publisher page

Abstract

Recent advances in heterogeneous catalysts indicate that single atoms (SAs), anchored/stabilized on metal oxide nanostructures, exhibit not only high catalyst atom efficiency but also intriguing reactivity and selectivity. Herein, isolated Pt SA-anchored CuCrO2 (CCO) has been designed by a glycine–nitrate solution combustion synthesis (SCS) route. The density of isolated Pt SAs achieves the highest value of ∼100 μm–2 for the 1.39 wt % Pt-anchored CCO sample, which results in the drastically boosted H2S response characteristics, including a high response of 1250 (35 times higher than that of pure CCO) at 10 ppm H2S and a low operating temperature of 100 °C. Except for CH4S, the responses of a 1.39 wt % Pt-anchored CCO chemiresistor to diverse vapors with concentrations of 50–100 ppm are less than 2, exhibiting excellent selectivity. Various ex situ characterizations indicate that the spillover catalytic effect of Pt SA sites, other than the conventional sulfuration–desulfuration mechanism, plays a dominant role in the outstanding H2S response characteristics.
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Research context

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Advanced Photocatalysis Techniques · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China

Anhui Provincial Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, and Key Lab of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences, Hefei 230031, China

Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China

Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China

Department of Electrical Engineering, Indian Institute of Technology Jodhpur, Jodhpur 342011, India

College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China

Shenzhen Shengfang Technology Company Limited, Shenzhen 518116, China

Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic2 Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China

Funding

National Science and Technology Development Agency · Science, Technology and Innovation Commission of Shenzhen Municipality · National Natural Science Foundation of China · Chinese Academy of Sciences · Natural Science Foundation of Top Talent of Shenzhen Technology University · Key Lab of Photovoltaic and Energy Conservation Materials

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