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Title: Controlled Surface Segregation Leads to Efficient Coke-Resistant Nickel/Platinum Bimetallic Catalysts for the Dry Reforming of Methane

Journal Article · · ChemCatChem
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  1. King Abdullah Univ. of Science and Technology, Thuwal (Saudi Arabia)
  2. SABIC Corporate Research and Innovation Center, Thuwal (Saudi Arabia)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)

The surface composition and structure are of vital importance for heterogeneous catalysts, especially for bimetallic catalysts, which often vary as a function of reaction conditions (known as surface segregation). The preparation of bimetallic catalysts with controlled metal surface composition and structure is very challenging. In this study, we synthesize a series of Ni/Pt bimetallic catalysts with controlled metal surface composition and structure using a method derived from surface organometallic chemistry. Moreover, the evolution of the surface composition and structure of the obtained bimetallic catalysts under simulated reaction conditions is investigated by various techniques, which include CO-probe IR spectroscopy, high-angle annular dark-field scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy, extended X-ray absorption fine structure analysis, X-ray absorption near-edge structure analysis, XRD, and X-ray photoelectron spectroscopy. It is demonstrated that the structure of the bimetallic catalyst is evolved from Pt monolayer island-modified Ni nanoparticles to core–shell bimetallic nanoparticles composed of a Ni-rich core and a Ni/Pt alloy shell upon thermal treatment. The catalysts are active for the dry reforming of methane, and their catalytic activities, stabilities, and carbon formation vary with their surface composition and structure.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
SC00112704
OSTI ID:
1228975
Report Number(s):
BNL-111050-2015-JA
Journal Information:
ChemCatChem, Vol. 7, Issue 5; ISSN 1867-3880
Publisher:
ChemPubSoc Europe
Country of Publication:
United States
Language:
English

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Effect of NiAl 2 O 4 Formation on Ni/Al 2 O 3 Stability during Dry Reforming of Methane journal July 2015
Recent Scientific Progress on Developing Supported Ni Catalysts for Dry (CO2) Reforming of Methane journal March 2018
Anti-Coking Ni/SiO 2 Catalyst for Dry Reforming of Methane: Role of Oleylamine/Oleic Acid Organic Pair journal October 2015
Effect of Ni Content of Ni/γ‐Al 2 O 3 Catalysts Prepared by the Atomic Layer Deposition Method on CO 2 Reforming of Methane journal April 2019
Progress in Synthesis of Highly Active and Stable Nickel-Based Catalysts for Carbon Dioxide Reforming of Methane journal October 2015
Selective steam reforming of n ‐dodecane over stable subnanometric NiPt clusters encapsulated in Silicalite‐1 zeolite journal January 2020
A Review on Bimetallic Nickel-Based Catalysts for CO 2 Reforming of Methane journal August 2017
Lewis Acid Sites Stabilized Nickel Catalysts for Dry (CO 2 ) Reforming of Methane journal November 2016
Syngas production by partial oxidation of ethanol on PtNi/SiO 2 –CeO 2 catalysts journal January 2019
Experimental Study on Dry Reforming of Biogas for Syngas Production over Ni-Based Catalysts journal December 2019