A Heterogeneous Carbon Nitride-Nickel Photocatalyst for Efficient Low-Temperature CO2 Methanation

被引：68

作者：

Barrio, Jesus ^{[1
,2
]}

Mateo, Diego ^{[3
]}

Albero, Josep ^{[3
]}

Garcia, Hermenegildo ^{[3
]}

Shalom, Menny ^{[1
,2
]}

机构：

[1] Ben Gurion Univ Negev, Dept Chem, IL-8410501 Beer Sheva, Israel

[2] Ben Gurion Univ Negev, Ilse Katz Inst Nanoscale Sci & Technol, IL-8410501 Beer Sheva, Israel

[3] Univ Politecn Valencia, Inst Univ Mixto Tecnol Quim UPV CSIC, Avda Narajos S-N, E-46022 Valencia, Spain

来源：

ADVANCED ENERGY MATERIALS | 2019年 / 9卷 / 44期

基金：

以色列科学基金会;

关键词：

carbon nitride; CO2; reduction; Ni nanoparticles; photocatalysis; Sabatier reaction; ENERGY-CONVERSION; REDUCTION; WATER; NANOPARTICLES; GRAPHENE;

D O I：

10.1002/aenm.201902738

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Sabatier reaction, i.e., the hydrogenation of CO2 to methane (CH4) using hydrogen (H-2), constitutes a potentially scalable method to store energy in a product with a high energy density. However, up to today, this reaction has been mainly thermally driven and conducted at high temperatures (typically 400-600 degrees C). Using light as a renewable energy source will allow for a more sustainable process by lowering the reaction temperature. Here, it is demonstrated that Ni nanoparticles support on graphitic carbon nitride (g-CN) are a highly efficient and stable photocatalyst for the gas-phase CO2 methanation at low temperature (150 degrees C). Detailed mechanistic studies reveal a very low activation energy for the reaction and high activity under visible light, leading to a remarkable and continuous CH4 production of 28 mu mol g(-1) h(-1) of CH4 for 24 h.

引用

页数：7

共 44 条

[1] Highly active Ni-promoted mesostructured silica nanoparticles for CO2 methanation [J].