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1. Mixed conductive composites for ‘Low-Temperature’ thermo-chemical CO₂ splitting and syngas generation

Author:
Jiang, Qiongqiong; Gao, Yunfei; Haribal, Vasudev Pralhad; Qi, He; Liu, Xingbo; Hong, Hui; Jin, Hongguang; Li, Fanxing
Source:
Journal of materials chemistry A 2020 v.8 no.26 pp. 13173-13182
ISSN:
2050-7496
Subject:
X-ray diffraction; activation energy; active sites; alloys; carbon dioxide; carbon monoxide; catalysts; electrical conductivity; iron; methane; nanoparticles; nickel; oxidation; oxidative stability; oxygen; platinum; synthesis gas; temperature; transmission electron microscopy
Abstract:
... An effective strategy to design platinum group metal (PGM) free redox catalysts for “low temperature” CO₂ splitting followed with methane partial oxidation was proposed and validated. Composites of mixed ionic-electronic conductive (MIEC) oxides were found to be highly effective at relatively low temperatures (600–750 °C). Specifically, perovskite structured LaNi₀.₃₅Fe₀.₆₅O₃ and rock salt structur ...
DOI:
10.1039/d0ta03232h

2. Hydrogen storage performances, kinetics and microstructure of Ti1.02Cr1.0Fe0.7-xMn0.3Alx alloy by Al substituting for Fe

Author:
Li, Jigang; Guo, Yanru; Jiang, Xiaojing; Li, Shuan; Li, Xingguo
Source:
Renewable energy 2020 v.153 pp. 1140-1154
ISSN:
0960-1481
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; activation energy; alloys; aluminum; aluminum oxide; dehydrogenation; energy-dispersive X-ray analysis; grinding; heat treatment; hydrides; hydrogen; iron; kinetics; melting; microstructure; renewable energy sources; scanning electron microscopy; storage quality; toxicity; transmission electron microscopy
Abstract:
... For achieving good economic and environmental benefit, capacity of hydrogen storage alloys plays an important role in high-pressure-metal-hydride system of refueling station. Hydrogen storage characteristics of Ti₁.₀₂Cr₁.₀Fe₀.₇₋ₓMn₀.₃Alₓ (0 ≤ x ≤ 0.1) alloys with main C14 structure were analyzed by Pressure-Composition-Temperature, XRD, HRTEM, SEM, EDS, ICP and XPS measurements, which were prepare ...
DOI:
10.1016/j.renene.2020.02.035

3. Effective combination of CuFeO2 with high temperature resistant Nb-doped TiO2 nanotube arrays for CO2 photoelectric reduction

Author:
Zhang, Liqiang; Cao, Huazhen; Lu, Yueheng; Zhang, Huibin; Hou, Guangya; Tang, Yiping; Zheng, Guoqu
Source:
Journal of colloid and interface science 2020 v.568 pp. 198-206
ISSN:
0021-9797
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorption; alloys; argon (noble gases); carbon dioxide; cathodes; copper; crystallization; ethanol; heat treatment; iron; liquids; microstructure; nanotubes; oxidation; photocatalysis; reflectance spectroscopy; scanning electron microscopy; semiconductors; temperature; titanium dioxide; transmission electron microscopy
Abstract:
... Herein, we report a simple approach to synthesize CuFeO₂/TNNTs photocathodes composed of high-temperature resistance n-type Nb-doped TiO₂ nanotube arrays (TNNTs) and p-type CuFeO₂ for CO₂ reduction. TNNTs were prepared by anodic oxidation on TiNb alloy sheets and CuFeO₂/TNNTs were then prepared by coating precursor liquid onto TNNTs followed by heat treatment in argon atmosphere. The microstructur ...
DOI:
10.1016/j.jcis.2020.01.082

4. Synergetic utilization of copper slag and ferruginous manganese ore via co-reduction followed by magnetic separation process

Author:
Zhu, Deqing; Xu, Jiwei; Guo, Zhengqi; Pan, Jian; Li, Siwei; Pan, Liaoting; Yang, Congcong
Source:
Journal of cleaner production 2020 v.250 pp. 119462
ISSN:
0959-6526
Subject:
X-ray diffraction; additives; alloys; catalysts; copper; cost effectiveness; energy-dispersive X-ray analysis; furnaces; iron; leaching; magnetic separation; magnetism; manganese; manganese dioxide; melting point; scanning electron microscopy; slags; sulfides
Abstract:
... Attempts to economically and effectively treat copper slag (CS) and ferruginous manganese ore(FMO) using the traditional direct reduction–magnetic separation process have faced many challenges, such as low levels of metal recovery, poor cost-effectiveness and the need for a high proportion of additives. This paper proposes an eco-friendly process to synchronously utilise copper slag and ferruginou ...
DOI:
10.1016/j.jclepro.2019.119462

5. Steam reforming of polystyrene at a low temperature for high H2/CO gas with bimetallic Ni-Fe/ZrO2 catalyst

Author:
Zhou, Hui; Saad, Juniza Md; Li, Qinghai; Xu, Yongqing
Source:
Waste management 2020 v.104 pp. 42-50
ISSN:
0956-053X
Subject:
X-ray diffraction; alloys; carbon; carbon dioxide; carbon monoxide; catalysts; fuels; hydrogen; iron; nickel; plastics; polystyrenes; steam; temperature; thermodynamics; waste management; wastes; zirconium oxide
Abstract:
... Recovery of chemicals and fuels from unrecyclable waste plastics at high temperatures (>800 °C) has received much research attention. Thermodynamic equilibrium calculation suggests that it is possible to perform the low-temperature steam reforming of polystyrene. In this study, we synthesized a Ni-Fe bimetallic catalyst for the low-temperature (500 °C) steam reforming of polystyrene. XRD character ...
DOI:
10.1016/j.wasman.2020.01.017

6. CeO2 nanorods supported M–Co bimetallic oxides (M = Fe, Ni, Cu) for catalytic CO and C3H8 oxidation

Author:
Liu, Zhongqi; Li, Junhao; Wang, Ruigang
Source:
Journal of colloid and interface science 2020 v.560 pp. 91-102
ISSN:
0021-9797
Subject:
X-ray diffraction; alloys; carbon monoxide; catalysts; catalytic activity; ceric oxide; cobalt; copper; energy-dispersive X-ray analysis; iron; nanorods; nickel; oxidation; oxygen; propane; synergism; transmission electron microscopy
Abstract:
... Supported bimetallic catalysts with rational compositions and structural design have attracted great interest, due to the tunable structural orientation (alloy or intermetallic compound and core-shell structure etc.), synergetic effects, and combined properties related to the presence of two individual metals. In this study, 10 wt% Fe-Co, Ni-Co and Cu-Co bimetallic oxides with 1:2 atomic ratio (Fe ...
DOI:
10.1016/j.jcis.2019.10.046