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h -BN载体对Cs-Ru/h -BN催化合成氨性能的影响Effects of
h -BN on catalytic performances of Cs-Ru/h -BN for ammonia synthesis- 低碳化学与化工 2026, 51(1): 141-149.
- 作者机构：
湖北民族大学 化学与环境工程学院，湖北 恩施 445000
- 作者简介：
高 超（2004—），本科生，研究方向为催化合成氨，E-mail：488721149@qq.com。
黄 佳（1987—），博士，讲师，研究方向为工业催化，E-mail：2023082@hbmzu.edu.cn；
姚林利（1993—），博士，讲师，研究方向光电化学，E-mail：2023079@hbmzu.edu.cn。
- 基金信息：国家自然科学基金地区基金(22566019);湖北省自然科学青年基金(2024AFB452;2024AFB496);大学生创新创业训练计划(S202410517025)
DOI：10.12434/j.issn.2097-2547.20250244
中图分类号： TQ426.82;TO643.3收稿：2025-05-26，
修回：2025-07-21，
纸质出版：2026-01-25
- 稿件说明：
移动端阅览
高超,江显灿,杨阳等.h-BN载体对Cs-Ru/h-BN催化合成氨性能的影响[J].低碳化学与化工,2026,51(1):141-149.
GAO Chao,JIANG Xiancan,YANG Yang,et al.Effects of h-BN on catalytic performances of Cs-Ru/h-BN for ammonia synthesis[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(1):141-149.
高超,江显灿,杨阳等.h-BN载体对Cs-Ru/h-BN催化合成氨性能的影响[J].低碳化学与化工,2026,51(1):141-149. DOI： 10.12434/j.issn.2097-2547.20250244.
GAO Chao,JIANG Xiancan,YANG Yang,et al.Effects of h-BN on catalytic performances of Cs-Ru/h-BN for ammonia synthesis[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(1):141-149. DOI： 10.12434/j.issn.2097-2547.20250244.
摘要
NH
3
是一种重要的无机化工原料，也是一种理想的氢能载体。Ru基催化剂因其在低温低压下具有优于传统铁基催化剂的催化性能而备受关注。以4种商业六方氮化硼（
h
-BN）为载体负载Ru和助剂CsNO
3
，制备
了
x
Cs-Ru/
h
-BN（
x
=
n
(Cs)/
n
(Ru)）催化剂。采用XRD、SEM、N
2
吸/脱附、H
2
-TPR和XPS等对载体和催化剂的理化性质进行了表征，考察了温和反应条件下催化剂的催化性能，并利用动力学分析了N
2
、H
2
和NH
3
的反应级数。结果表明，2Cs-Ru/
h
-BN-1表面Ru具有更高活性，能降低CsNO
3
分解和还原的温度，有利于Ru表面N
2
分子解离。动力学分析表明，2Cs-Ru/
h
-BN-1的H
2
反应级数为正，说明催化剂表面解离的氢原子更易迁移转化，这不仅能抑制催化剂氢中毒并稳定合成氨，还能释放出更多活性位点用于N
2
分子解离。在400 ℃、0.1 MPa和合成气流速60 mL/min（
V
(H
2
):
V
(N
2
) = 3:1）的条件下反应1 h，2Cs-Ru/h-BN-1的合成氨速率（以每克催化剂计）为3902 μmol/(g·h)，且该催化剂可稳定运行48 h。
Abstract
NH
3
is a crucial inorganic chemical raw material and an ideal hydrogen energy carrier. Ru-based catalysts have attracted significant attention due to their superior catalytic performances under low-temperature and low-pressure conditions compared to traditional iron-based catalysts.
x
Cs-Ru/
h
-BN (
x
=
n
(Cs)/
n
(Ru)) catalysts were synthesized by supporting Ru and the promoter CsNO
3
onto four commercial hexagonal boron nitride (
h-
BN) substrates. The physicochemical properties of the support and catalysts were characterized by XRD
SEM
N
2
adsorption/desorption
H
2
-TPR
and XPS. The catalytic performances for ammonia synthesis of four catalysts under mild conditions were evaluated
and the reaction orders of N
2
H
2
and NH
3
were analyzed through kinetics. The results show that the Ru species on the surface of 2Cs-Ru/
h-
BN-1 exhibits higher activity
effectively lowering the decomposition and reduction temperatures of CsNO
3
and thereby facilitating N
2
dissociation on the Ru active sites. Kinetic analysis reveals that the hydrogen reaction order of 2Cs-Ru/
h
-BN-1 is po
sitive
indicating that the dissociated hydrogen atoms on the catalyst surface are more prone to migration and transformation. This not only suppresses hydrogen poisoning of the catalyst to stabilize ammonia synthesis but also releases more active sites for the dissociation of N
2
molecules. Under the reaction conditions of 400 ℃
0.1 MPa and syngas flow rate of 60 mL/min (
V
(H
2
):
V
(N
2
) = 3:1)
2Cs-Ru/h-BN-1 achieves an ammonia synthesis rate (calculated by per gram of catalyst) of 3902 μmol/(g·h) after 1 h of reaction and can operate stably for 48 h.
关键词
Keywords
references
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