Promoting Dry Reforming of Methane Catalysed by Atomically‐Dispersed Ni over Ceria‐Upgraded Boron Nitride

Abstract

Dry reforming of methane (DRM) is a very promising protocol to mitigate the greenhouse gases by making use of CO 2 and CH 4 to produce valuable syngas. Nibased 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 2 and its surface-active oxygen species would contribute to the activation of CH 4 . Moreover, Ni exhibited a strong metalsupport 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.

Unraveling the Unique Promotion Effects of a Triple Interface in Ni Catalysts for Methane Dry Reforming

“…Therefore, metal–BN interfaces can be constructed with the expectation of facilitating MDR. Most recently, we found that the interface of Ni–BN could enhance the coke resistance of Ni catalysts. ,− However, the sintering of Ni particles still happened over the bare BN surface. The metal oxide was introduced to further improve the sintering resistance of the Ni/BN catalysts.…”

Functional CeOx Stabilized Metallic Ni Catalyst Supported on Boron Nitride for Durable Partial Oxidation of Methane to Syngas at High Temperature

“…As reported in recent literature, the Ni species tend to agglomerate into large particles on h-BN due to the hydrophobic properties of pristine BN. 42 In this work, the introduction of CeO x can provide new sites for Ni species anchoring.…”

Rise of atomically dispersed metal catalysts: Are they a new class of catalysts?

“…Zhang et al have also demonstrated the coke-resistant character of an atomically dispersed metal catalyst for high-temperature dry reforming of methane (DRM). 37,47 The initial activity and stability of the atomically dispersed Ni catalyst against coke formation were promising. However, single-atomic Ni sites easily agglomerated into large metal particles during the high-temperature DRM reaction, making them susceptible to coke formation and resulting in rapid deactivation.…”

“…Zhang et al have also demonstrated the coke‐resistant character of an atomically dispersed metal catalyst for high‐temperature dry reforming of methane (DRM) 37,47 . The initial activity and stability of the atomically dispersed Ni catalyst against coke formation were promising.…”