ACS catalysis: a new catalyst developed by Shanghai Silicate Institute for photocatalytic reduction of CH4 by CO2

A large number of CO2 emissions lead to the increasing greenhouse effect, sea level rise, water acidification and other global issues How to transform CO2 into useful energy chemicals has become a research hotspot Catalytic reduction of CO2 by clean and renewable solar energy is considered to be an ideal way to solve the energy crisis and environmental pollution At present, the widely used photocatalyst for CO 2 reduction is supported noble metal (such as Pt, PD, Au and Ag) semiconductor material, which has high cost TiO2 has been widely concerned in the field of photocatalytic reduction of CO2 due to its advantages of low cost, easy availability and good stability However, due to its wide band gap (3.2eV), serious recombination of photogenerated electron hole pair (E − H +, and many side reactions, the photocatalytic performance and utilization efficiency of solar energy are low Recently, the research group of photoelectric conversion materials and devices in the State Key Laboratory of high performance ceramics and ultra microstructure, Shanghai Silicate Research Institute, Chinese Academy of Sciences Important progress has been made in the preparation of high value-added methane by photocatalytic selective reduction of carbon dioxide Through the design and creation of a new hydrogenated blue titanium dioxide material, the research group has successfully realized the efficient conversion of CO2 reduction to CH4 under near ambient pressure, and has carried out a more in-depth study on the reaction mechanism through in-situ diffuse reflectance Fourier transform infrared and other technologies The related research results were published on ACS catalysis The first author of this paper is Yin Guoheng, a doctoral candidate of Shanghai Silicate Institute, and the co authors are Dr Bi Qingyuan, researcher Huang Fuqiang and Professor Han Yifan of East China University of technology The possible reaction mechanism of the photoreduction of CO 2 by hydrogenated blue titanium dioxide (source: ACS Catalysis) the research group prepared hydrogenated blue titanium dioxide with a large number of surface defects by a simple low-temperature solvothermal method based on the design and preparation of materials and band gap regulation The material shows excellent performance of solar photocatalytic reduction of CO2 The yield of CH4 in space-time is 16.2 μ mol g-1h-1, and the selectivity is 81%, which is the best reported at present The process and mechanism of the reaction were studied by kinetic isotope effect experiments and in-situ infrared spectroscopy At the same time, the material also showed good catalytic performance for photocatalytic hydrogen production and degradation of organic pollutants Paper link: http://pubs.acs.org/doi/10.1021/acs.7b03473 correspondence Author: Dr Bi Qingren http://www.sic.cas.cn/kybm/skl/ryjg/fyjy/bqy/huang Fuqiang researcher http://sourcedb.sic.cas.cn/zw/rck/200906/t20090623_.html Professor Han Yifan http://hgxy.security.edu.cn/2016/0419/c1270a9520/page.htm