摘要
光热催化是在光催化的基础上同时加热,或在热催化的基础上同时进行光照以达到共同催化目的的一种新型催化手段,是当前催化领域的研究热点。文章介绍了光热协同催化在能源合成领域的应用,包括光热催化CO加氢、光热催化CO_2还原、光热分解水制氢等。研究发现,光催化与热催化耦合确实能够高效驱动反应的进行,明显改善了单一光催化或单一热催化的不足。在催化CO加氢方面,引入光照能明显提高CO的转化效率,同时能够调控烃类产物分布;在催化CO_2还原方面,通过调变合适的光热反应条件,能够实现高效地、选择性地将CO_2还原为CO、CH_4或其他烃类产物;在催化H2O分解制氢方面,在温和条件下提高了产氢效率。与此同时,本文也分析了部分体系的光热协同作用机制以及现阶段研究的不足之处。最后展望了光热催化的发展前景,以期对于光热协同驱动体系的研究起到积极的促进作用。
Photothermocatalysis has presented a novel technology which introduces simultaneous lightinto thermocatalytic system or heat into photocatalytic system for the purpose of co-catalysis,which hasbecome popular in catalysis field.This paper mainly reviews chemical reactions in the field of energysynthesis under cooperative catalysis condition,including photothermocatalytic hydrogenation of CO,photothermocatalytic CO2reduction,and photothermal hydrolysis,etc.The current results suggested thatthe coupling of photocatalysis and thermocatalysis could drive reaction more efficiently,and overcomethe obstacles existed in single-driven catalytic system.In the field of CO hydrogenation reaction,theintroduction of illumination not only can obviously increase the CO conversion efficiency but also controlhydrocarbon products’distribution.In the field of CO2reduction,it can be implemented that convertingCO2into CO,CH4,or other hydrocarbon products efficiently and selectively by modulating appropriatephotothermal conditions.In the field of hydrolysis reaction,hydrogen production efficiency can beimproved under mild conditions.Meanwhile,the related photothermal synergistic reaction mechanismsand the deficiencies at the present stage in various systems have been summarized.Finally,the prospectsfor future photothermal catalytic study are proposed,which might provide a positive pathway fordeveloping new photothermal catalytic systems.
作者
王丽敏
王利清
张一弛
苏海全
WANG Limin;WANG Liqing;ZHANG Yichi;SU Haiquan(School of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot 010021,Inner Mongolia,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2017年第7期2457-2463,共7页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(21461017)
高等学校博士学科点专项科研基金(20131501110001)项目
关键词
光热催化
一氧化碳
加氢
二氧化碳
选择催化还原
制氢
photothermocatalysis
carbon monoxide
hydrogenation
carbon dioxide
selective catalytic reduction
hydrogen production
