Single-Phase Formation of Rh2 O3 Nanoparticles on h-BN Support for Highly Controlled Methane Partial Oxidation to Syngas.
Single-phase formation of active metal oxides on supports has been vigorously pursued in many catalytic applications to suppress undesired reactions and to determine direct structure-property relationships. However, this is difficult to achieve in nanoscale range because the effect of non-uniform metal-support interfaces becomes dominant in the overall catalyst growth, leading to the nucleation of various metastable oxides. Herein, we develop a supported single-phase corundum-Rh2 O3 (I) nanocatalyst by utilizing controlled interaction between metal oxide and h-BN support. Atomic-resolution electron microscopy and first-principle calculation reveal that single-phase formation occurs via uniform and preferential attachment of Rh2 O3 (I) (110) seed planes on well-defined h-BN surface after decomposition of rhodium precursor. By utilizing the Rh/h-BN catalyst in methane partial oxidation, syngas is successfully produced solely following the direct route with keeping a H2 /CO ratio of 2, which makes it ideal for most downstream chemical processes.
['Kim|Younhwa|Y|', 'Kang|Sungsu|S|', 'Kang|Dohun|D|', 'Lee|Kyung Rok|KR|', 'Song|Chyan Kyung|CK|', 'Sung|Jongbaek|J|', 'Kim|Ji Soo|JS|', 'Lee|Hyunjoo|H|', 'Park|Jungwon|J|http://orcid.org/0000-0003-2927-4331', 'Yi|Jongheop|J|http://orcid.org/0000-0001-9779-7551']
methane syngas heterogeneous catalysis hexagonal boron nitride rhodium oxide