Layered perovskite-like La2−xCaxNiO4±δ derived catalysts for hydrogen production via auto-thermal reforming of acetic acid,Catalysis Science & Technology

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Layered perovskite-like La2−xCaxNiO4±δ derived catalysts for hydrogen production via auto-thermal reforming of acetic acid
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-03-16 00:00:00 , DOI: 10.1039/c8cy00116b
Wei Xie _{1,

2,

3,

4} , Jilong Yang _{1,

2,

3,

4} , Qiao Wang _{1,

2,

3,

4} , Lihong Huang _{1,

2,

3,

4,

5} , Ning Wang _{6,

7,

8,

9,

10}

Affiliation

Acetic acid from bio-oil is a renewable resource for hydrogen production. Layered perovskite-like Ca-doped La_2−xCa_xNiO_4±δ (x = 0, 0.5, 1, 1.5 and 2) catalysts were prepared via a sol–gel method and tested in auto-thermal reforming (ATR) of acetic acid (AC) for hydrogen production. XRD, TPR, BET, XPS, TG, SEM and TEM characterization was carried out; the results show that the layered perovskite-like structure was the main phase in La_2−xCa_xNiO_4±δ with 0 ≤ x ≤ 1, and La–Ca–O composite oxide species increased with increasing calcium content, while the reducibility of Ni metal was gradually enhanced as well. During the ATR process, La₂O₂CO₃ and CaCO₃ species were generated and nickel particles were stable, suggesting that partial substitution of La by Ca in La_2−xCa_xNiO_4±δ was beneficial to stabilizing Ni particles with less coking. As a result, over the LaCaNiO_4±δ catalyst, the AC conversion reached 100% and the hydrogen yield remained stable near 2.80 mol-H₂ per mol-AC during the ATR test.

中文翻译：

层状钙钛矿型La _{2− x} Ca _x NiO _{4± δ}衍生的催化剂，用于通过乙酸自动热重整制氢

来自生物油的乙酸是用于制氢的可再生资源。通过溶胶-凝胶法制备层状钙钛矿型掺杂Ca的La ₂ - _x Ca _x NiO _{4± δ}（x = 0、0.5、1、1.5和2）催化剂，并在自热重整（ATR）中进行了测试。乙酸（AC）用于制氢。进行了XRD，TPR，BET，XPS，TG，SEM和TEM表征; 该结果表明，该层状钙钛矿样结构是在La主相中_2-_X的Ca _X的NiO _4±_δ 0≤ X≤1，且La–Ca–O复合氧化物种类随钙含量的增加而增加，而镍金属的还原性也逐渐增强。在ATR过程中，生成了La ₂ O ₂ CO ₃和CaCO ₃物种，并且镍颗粒稳定，这表明La _{2- x} Ca _x NiO _{4± δ}中的Ca部分取代La有利于稳定含少量Ni的颗粒。焦化。结果，在ATR测试中，在LaCaNiO _{4± δ}催化剂上，AC转化率达到100％，并且氢产率在每mol-AC 2.80mol -H ₂附近保持稳定。

更新日期：2018-03-16

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