Mesoporous Ti0.5Cr0.5N for trace H2S detection with excellent long-term stability

Chaozhu Huang; Dongliang Liu; Dongting Wang; Haichuan Guo; Tiju Thomas; J Paul Attfield; Fengdong Qu; Shengping Ruan; Minghui Yang

doi:10.1016/j.jhazmat.2021.127193

Mesoporous Ti_0.5Cr_0.5N for trace H₂S detection with excellent long-term stability

J Hazard Mater. 2022 Feb 5;423(Pt B):127193. doi: 10.1016/j.jhazmat.2021.127193. Epub 2021 Sep 12.

Authors

Chaozhu Huang¹, Dongliang Liu², Dongting Wang², Haichuan Guo², Tiju Thomas³, J Paul Attfield⁴, Fengdong Qu⁵, Shengping Ruan⁶, Minghui Yang⁷

Affiliations

¹ Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
² Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
³ Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras Adyar, Chennai 600036, India.
⁴ Centre for Science at Extreme Conditions and School of Chemistry, University of Edinburgh, King's Buildings, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom.
⁵ Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China. Electronic address: fqu@nimte.ac.cn.
⁶ State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China. Electronic address: ruansp@jlu.edu.cn.
⁷ Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: myang@nimte.ac.cn.

PMID: 34844341
DOI: 10.1016/j.jhazmat.2021.127193

Abstract

Efficient, accurate and reliable detection and monitoring of H₂S is of significance in a wide range of areas: industrial production, medical diagnosis, environmental monitoring, and health screening. However the rapid corrosion of commercial platinum-on-carbon (Pt/C) sensing electrodes in the presence of H₂S presents a fundamental challenge for fuel cell gas sensors. Herein we report a solution to the issue through the design of a sensing electrode, which is based on Pt supported on mesoporous titanium chromium nitrides (Pt/Ti_0.5Cr_0.5N). Its desirable characteristics are due to its high electrochemical stability and strong metal-support interactions. The Pt/Ti_0.5Cr_0.5N-based sensors exhibit a much smaller attenuation (1.3%) in response to H₂S than Pt/C-sensor (40%), after 2 months sensing test. Furthermore, the Pt/Ti_0.5Cr_0.5N-based sensors exhibit negligible cross response to other interfering gases compared with hydrogen sulfide. Results of density functional theory calculation also verify the excellent long-term stability and selectivity of the gas sensor. Our work hence points to a new sensing electrode system that offers a combination of high performance and stability for fuel-cell gas sensors.

Keywords: Fuel cell gas sensor; Hydrogen sulfide; Room-temperature; Solid-solid separation method; Ti(0.5)Cr(0.5)N.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Electrodes
Gases
Hydrogen Sulfide*
Platinum*
Titanium

Substances

Gases
Platinum
Titanium
Hydrogen Sulfide