单活性位TS-1分子筛光催化还原二氧化碳合成甲烷研究

Researches on Photocatalytic CO_(2) Reduction to Methane over Single-site Photocatalyst TS-1 Zeolite

研究了以担载铂的TS-1钛硅分子筛为催化剂,以氢气为电子给体和氢源,光催化还原二氧化碳合成甲烷。系统考察了助催化剂铂、电子给体氢气对催化性能影响。试验表明,适宜的铂担载量质量分数为1%,适宜的氢气和二氧化碳的体积比约为1∶1。基于试验结果和文献,推断了光催化还原二氧化碳反应过程和机理。

The study uses platinum-supported TS-1 titanium silicon molecular sieve as a catalyst,hydrogen as an electron donor and hydrogen source,and photocatalytic reduction of carbon dioxide to synthesize methane.The effects of promoter platinum and electron donor hydrogen on catalytic performance were systematically investigated.Experiments show that the suitable mass fraction platinum loading is 1%,and the suitable volume ratio of hydrogen to carbon dioxide is about 1∶1.Based on the test results and literature,the process and mechanism of the photocatalytic reduction of carbon dioxide were inferred.