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October 2019
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10 Reads
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3 Citations
The Cover Feature depicts that the robust activity for the Pd‐Ni alloy anode in the hydrazine‐oxidation‐assisted hydrogen production is mainly caused by the metallization of Ni through the reaction between Ni hydroxide and Pd hydride.More information can be found in the Article by M. Du et al.
September 2019
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65 Reads
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14 Citations
Due to the oxophilic property of Ni catalyst and thereby its sluggish kinetics toward hydrazine oxidation reaction (HzOR), ultra‐low amount of Pd is incorporated with Ni to form the integrative Ni@Pd‐Ni alloy nanowire arrays electrocatalyst by the templated electrodeposition and subsequent galvanic replacement method. The morphology, crystalline structure and composition of the as‐prepared catalyst are characterized by FESEM, TEM, XRD, XPS and ICP. The electrochemical evaluations show the onset potential on the Ni@Pd‐Ni alloy nanowire arrays for HzOR is ‐0.99 V vs. Ag/AgCl, significantly lowered by 800 mV compared with the Ni nanowire arrays. Two possible factors contribute to the robust HzOR kinectics: i. the metallization of Ni by the PdHx; ii, the heterogeneous catalytic pathway on the Pd‐Ni alloy. Furthermore, the innovative structure also endows Ni@Pd‐Ni alloy nanowire arrays with the considerable durability, indicating it’s a promising anode electrocatalyst for the HzOR‐assisted hydrogen production and simultaneous hydrazine‐containing sewage treatment.
August 2019
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31 Reads
IOP Conference Series Earth and Environmental Science
The development of floating reactors needs to take into account the marine ecological environment. The recycling of waste in floating nuclear power plant is different from the onshore nuclear power because of its limited space and resources. The purifying resin of primary circuit has a high radioactivity and accounts for a large proportion of floating solid waste, and the production of other radioactive waste generated during resin unloading is worthy of attention. In order to minimize the waste production during emission of radioactive resin, this paper uses the fluid dynamics theory of fluidized bed to calculate and analyze the waste production and emission effect in different media for transportation, and propose a reasonable resin emission program, which can provides a powerful design input for the waste treatment.
August 2019
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229 Reads
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10 Citations
IOP Conference Series Earth and Environmental Science
The coupling of floating nuclear reactor with different desalination processes was economically evaluated by using a desalination economic evaluation program (DEEP-5) software and a method of levelized annualized production water cost. Three desalination processes, namely, Multi-effect distillation (MED), multi-stage flash (MSF) or reverse osmosis (RO). The capacity of the plant was 20,000m3/day and its energy source was 100MWt nuclear power plant. The analysis indicated that water costs with the RO process have stronger economic competitive comparing to distillation processes, without regard to changes in water quality. The sensitivity analysis results showed that the sensitivity factors affecting the cost of desalinated water are, in order, discount rate, interest rate, Specific Construction Cost and Condensing temperature.
... Compared with PWE, the hydrazine-assisted water splitting only takes a much lower theoretical overall voltage for H 2 production. Recently, Du et al. found that the presence of 0.02 M hydrazine in the 1.0 M KOH solution could decrease the required voltage to attain 15 mA cm − 2 (0.63 vs. 1.97 V), using the bifunctional Ni@Pd − Ni alloy NAs as the anode and the cathode ( Du et al., 2019 ). Notwithstanding, external energy is required in the current HzOR/HER system, which is a considerable obstacle for practical applications. ...
October 2019
... Owing to the lower onset potential of MEA electrooxidation than oxygen evolution reaction (OER), hydrogen generation from MEA-containing electrolyte requires less electricity consumption than that from pure acidic/alkaline aqueous electrolyte [6]. Moreover, MEA electrooxidation as a substitution for OER during water splitting skillfully circumvents the explosion issue originated from the mixing of H 2 and O 2 gas [11]. Xianzhu Fu et al. prepared a Ni@Ni 3 S 2 /CNT nano-heterostructured electro-catalyst for simultaneous MEA electrooxidation and HER in MEA-containing saline water [6]. ...
September 2019
... The analytical model introduced in Chapter Four can be further developed to include economic analysis to find the levelized cost of water (LCOW) produced when thermal energy is added to an RO system. The LCOW is a measure of the cost per unit of water permeate produced by the system [257][258][259]. While specific energy is one of the critical variables in the feasibility of RO, other variables also affect the overall cost and financial viability of a project, and in many cases, cost-effective operation does not always align exactly with the minimum specific energy operating point of the system. ...
August 2019
IOP Conference Series Earth and Environmental Science
