Breakthrough scalable synthesis of anti-coking Cs-Ni/CeO_(x)-Al_(2)O_(3) nanocatalysts for optimal dry reforming performance  

作　　者：Kyung Hee Oh Shin Wook Kang Jin Gyu Lee Jung-Il Yang Byung-Hyun Kim Chang Seop Hong Ji Chan Park 

机构地区：[1]Clean Fuel Research Laboratory,Korea Institute of Energy Research,Daejeon 34129,Republic of Korea [2]Department of Chemistry,Korea University,Seoul 02841,Republic of Korea [3]Department of Chemical and Molecular Engineering,Hanyang University ERICA,Ansan 15588,Republic of Korea [4]Energy Engineering,University of Science and Technology,Daejeon 34113,Republic of Korea

出　　处：《Nano Research》2025年第2期913-929,共17页纳米研究(英文版)

基　　金：This work was conducted within the framework of a research and development program of the Korea Institute of Energy Research(Nos.C4-2403 and C4-2474).

摘　　要：The dry reforming(DR)reaction is an eco-friendly process for producing synthesis gas(CO,H_(2))from greenhouse gases(CH_(4),CO_(2)).Despite advancements in various nickel(Ni)supported catalysts for this reaction,achieving high catalyst stability against carbon deposition and improving conversion rates remain significant challenges.In this paper,we introduce a novel approach for synthesizing uniform Ni nanocatalysts with cesium(Cs)and cerium oxide(CeO_(x)).This synthesis is achieved using an automated device based on a co-melt infiltration technique.Our method addresses the limitations of conventional catalyst synthesis,such as complex procedures,low reproducibility,and difficulties in scaling up.The resulting catalysts contain uniformly small Ni particles,approximately 5 nm in size,with Cs and CeO_(x) evenly distributed throughout the alumina(Al_(2)O_(3))support.The developed Ni/CeO_(x)-Al_(2)O_(3) and Cs Ni/CeOx-Al_(2)O_(3) nanocatalysts demonstrate improved conversion performance and stability under various DR conditions.This improvement is attributed to the synergistic effect of Cs and CeO_(x),which creates a pathway to inhibit and remove carbon deposition.Additionally,these nanocatalysts exhibited superior resistance to carbon deposition compared to conventional Ni/Al_(2)O_(3) and commercial Ni catalysts under identical reaction conditions.

关 键 词：co-melt infitration NANOCATALYST PROMOTER dry reforming reaction coke resistance 

分 类 号：O64[理学—物理化学]