Hydroxyapatite Nanorods Rich in [Ca–O–P] Sites Stabilized Ni Species for Methane Dry Reforming
Hydroxyapatite Nanorods Rich in [Ca–O–P] Sites Stabilized Ni Species for Methane Dry Reforming
复制标题
富含[Ca-O-P]位点的羟基磷灰石纳米棒可稳定用于甲烷干重整的镍物质
DOI：
10.1021/acs.iecr.1c02895
复制
发表时间：
2021-10
期刊：
影响因子：
--
通讯作者：
Wen-Cui Li
中科院分区：
文献类型：
--
作者：
Yan-Bo Wang;Lei He;Bai-Chuan Zhou;Fan Tang;Jie Fan;Dong-Qi Wang;An-Hui Lu;Wen-Cui Li
镍基催化剂上甲烷干重整（MDR）是一种可持续的、生态足迹小的工艺，可有效利用两种丰富的温室气体。镍基催化剂由于积炭和镍烧结而失活是工业化进程的严重障碍。本文合成了富含[Ca-O-P]位的自制羟基磷灰石（HAP）纳米棒。此外，采用简单的湿浸渍法制备了极低Ni负载量的Ni取代HAP催化剂，通过Ni 2+取代[Ca-O-P]结构中的Ca 2+，同时获得了丰富的[Ni-O-P]中心和CaO碱性中心。羟基磷灰石纳米棒上的[Ni-O-P]位点和与[Ca-O-P]位点相关的CaO碱性位点的协同作用使得在600 °C下作为MDR的催化剂具有40.5 molCH 4·gNi-1·h-1的高比活性，而焦炭沉积量可忽略不计，该温度在化学上更容易形成焦炭。密度泛函理论计算证实，Ni阳离子以[Ni-O-P]的形式存在有利于CH 4的活化.相比之下，当使用商业羟基磷灰石作为载体时，所获得的催化剂显示出差的活性和稳定性。Ni与HAP之间的特殊相互作用可以为未来多相烃催化过程中的催化剂设计提供启示。
Methane dry reforming (MDR) to syngas over Ni-based catalyst is a sustainable process with a small ecological footprint by efficient utilization of two abundant greenhouse gases. The deactivation of Ni-based catalysts due to coke deposition and nickel sintering is a serious obstacle to the industrialization process. Herein, homemade hydroxyapatite (HAP) nanorods with enriched [Ca–O–P] sites were synthesized. Moreover, Ni-substituted HAP catalysts with extremely low Ni loading were prepared by facile wet impregnation, which simultaneously could obtain rich [Ni–O–P] sites and CaO basic sites by Ni2+substituting for Ca2+in the structure of [Ca–O–P]. The synergy of [Ni–O–P] sites and CaO basic sites associated with [Ca–O–P] sites on hydroxyapatite nanorods enables a high specific activity of 40.5 molCH4·gNi–1·h–1with a negligible amount of coke deposition as a catalyst for MDR at 600 °C, a temperature that is thermodynamically more prone to coke formation. Density functional theory calculations confirmed that the existence of Ni cations in the form of [Ni–O–P] is beneficial for CH4activation. In contrast, when commercial hydroxyapatite is used as the support, the obtained catalyst shows poor activity and stability. The special interaction between Ni and HAP can provide inspiration for future catalyst design in heterogeneous hydrocarbon catalysis processes.
登录
查看更多内容
高效稳定的甲烷干重整Ni/CeO2-SiO2催化剂：Ni/CeO2界面结构对SiO2的影响
DOI：
10.1016/j.apcatb.2019.01.070
发表时间：
2019-06
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
Xiaoliang Yan;Tong Hu;Peng Liu;Sha Li;Binran Zhao;Qian Zhang;Weiyong Jiao;Shuai Chen;Pengfei Wang;Jingjun Lu;Liming Fan;Xiaonan Deng;Yun-Xiang Pan
通讯作者：
Yun-Xiang Pan
Ni-Fe-MgO 催化剂上甲烷干重整：Fe 对耐碳性能和动力学的影响
DOI：
10.1016/j.apcatb.2019.118497
发表时间：
2020-05
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
Zhang Tingting;Liu Zhongxian;Zhu Yi-An;Liu Zhicheng;Sui Zhijun;Zhu Kake;Zhou Xinggui
通讯作者：
Zhou Xinggui
富含[Ca-O-P]位点的羟基磷灰石纳米线用于乙醇直接偶联，显示出高C6-12酒精产率
影响因子：
4.9
作者：
Qing-Nan Wang;Bai-Chuan Zhou;Xue-Fei Weng;Shao-Pei Lv;Ferdi Schüth;An-Hui Lu
通讯作者：
An-Hui Lu
高抗碳Ni@Ni页硅酸盐@SiO2核壳空心球低温CH4干重整催化剂
影响因子：
7.7
作者：
Li Ziwei;Jiang Bo;Wang Zhigang;Kawi Sibudjing
通讯作者：
Kawi Sibudjing
影响因子：
5.5
作者：
Xiancai Li;Q. Hu;Yifeng Yang;Yan Wang;F. He
通讯作者：
Xiancai Li;Q. Hu;Yifeng Yang;Yan Wang;F. He