Li Xiaoxu, Phornphimon Maitarad, Zhang Xiaoyu, Deng Jiang, Zhang Dengsong
International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, College of Sciences, Shanghai University, Shanghai, 200444, P. R. China.
Chem Asian J. 2022 May 2;17(9):e202101428. doi: 10.1002/asia.202101428. Epub 2022 Mar 19.
Dry reforming of methane (DRM) is a very promising protocol to mitigate the greenhouse gases by making use of CO and CH to produce valuable syngas. Ni-based catalysts exhibit high activity and low cost for DRM, but suffer from inferior stability because of serious carbon deposition. Herein, we proposed atomically dispersed Ni supported by ceria-upgraded boron nitride whose specific activity exceeds that of boron nitride-supported Ni by 3 times. The results of temperature-programmed surface reaction show ceria enhanced the adsorption of CO and its surface-active oxygen species would contribute to the activation of CH . Moreover, Ni exhibited a strong metal-support interaction which suppressed the metal sintering during the DRM reaction while the incorporation of BN could suppress carbon deposition. The incorporation of active metal oxides into inert support provides a route to adjust the interaction between metal and support, and to achieve a synergistic improvement in catalytic performance.
甲烷干重整（DRM）是一种非常有前景的方法，通过利用CO和CH来生产有价值的合成气，从而减少温室气体排放。镍基催化剂在DRM中表现出高活性和低成本，但由于严重的积碳问题，稳定性较差。在此，我们提出了一种由二氧化铈改性氮化硼负载的原子分散镍催化剂，其比活性比氮化硼负载的镍高出3倍。程序升温表面反应结果表明，二氧化铈增强了CO的吸附，其表面活性氧物种有助于CH的活化。此外，镍表现出很强的金属-载体相互作用，抑制了DRM反应过程中的金属烧结，而BN的引入可以抑制积碳。将活性金属氧化物引入惰性载体为调节金属与载体之间的相互作用以及实现催化性能的协同改善提供了一条途径。
