水电解氢氧发生器的改进

介绍水电解氢氧发生器的结构、应用优势,并提出改进建议。

水电解氢氧焊割机的研制

水电解氢氧焊割机的研制薛建设，王建平０序言我厂利用引进技术生产的ＱＪ－２０００型水电解氢氧焊割机，正是代替传统氧─—乙炔的理想产品。其结构设计和选材上突破了国内外现有专利技术，使成本大幅度下降，产气量达到２ｍ￣３／ｈ以上，其性能达到了国际先进水平，并...

水电解氢氧发生器在连铸坯切割上的应用

本文介绍了利用火焰加工新能源－水电解氢氧气用于冶金连铸坯切割技术背景，使用状况及应用前景，概要地说明了水电解氢氧发生器的构造及工作原理，通过实际推广与使用证实，利用水电解氢氧气切割连铸坯具有巨大的经济效益和社会效益，以及广阔的推广应用前景。

水电解氢氧发生器在连铸坯切割上的应用

介绍了利用火焰加工新能源—水电解氢氧气用于冶金企业连铸坯切割技术背景、使用状况及应用前景。概要地说明了水电解氢氧发生器的构造及工作原理。通过实际推广与使用证实 ,利用水电解氢氧气切割连铸坯具有显著的经济效益和社会效益以及广阔的推广应用前景。

浅谈氢氧火焰切割在连铸的生产应用

连铸坯氢氧火焰切割就是利用"水电解氢氧发生器"电解制取的氢氧混合气作为能源介质,取代传统的乙炔、丙烷等工业燃气,点火形成氢氧焰,氢氧焰火焰集中,温度高达2800度,燃烧强度仅次于乙炔而高于其它燃气,因而能快速切割连铸坯。

氢氧火焰在连铸坯切割中的安全应用

氢氧发生器(氢氧机)是一种用于切割作业的特殊设备,它是采用电化学方法,将贮存在机内电解槽中的水分解为氢气和氧气,氢氧气体经干燥除湿、水气分离后、安全防回火处理后输出至切割机械上,取代传统的乙炔、丙烷等工业燃气,点火形成氢氧焰,氢氧焰火焰集中,温度高达2800℃,因而能快速切割碳钢板、连铸坯钢板。但氢氧气安全性差:爆炸极限与乙炔相当(在氧中爆炸极限为4.7%～93.9%),而氢氧燃烧速度高于乙炔,爆炸危险性更大。

浅析连铸坯火焰切割在龙钢的应用

文章阐述了火焰的基本原理和基本特性,分析了氢氧焰在连铸火焰切割工艺应用的优势。对氢氧混合气应用进行了安全特性分析和应用过程发生的故障进行失效分析,并对应用工艺技术提出控制要求和今后改进发展的建设意见。

Hierarchical coral-like FeNi(OH)_x/Ni via mild corrosion of nickel as an integrated electrode for efficient overall water splitting

Efficient,stable,and noble‐metal‐free electrocatalysts for both the oxygen evolution reaction and the hydrogen evolution reaction are highly imperative for the realization of low‐cost commercial water‐splitting electrolyzers.Herein,a cost‐effective and ecofriendly strategy is reported to fabricate coral‐like FeNi(OH)x/Ni as a bifunctional electrocatalyst for overall water splitting in alkaline media.With the assistance of mild corrosion of Ni by Fe(NO3)3,in situ generated FeNi(OH)x nanosheets are intimately attached on metallic coral‐like Ni.Integration of these nanosheets with the electrodeposited coral‐like Ni skeleton and the supermacroporous Ni foam substrate forms a binder‐free hierarchical electrode,which is beneficial for exposing catalytic active sites,accelerating mass transport,and facilitating the release of gaseous species.In 1.0 mol L^-1 KOH solution,a symmetric electrolyzer constructed with FeNi(OH)x/Ni as both the anode and the cathode exhibits an excellent activity with an applied potential difference of 1.52 V at 10 mA cm^-2,which is superior to that of an asymmetric electrolyzer constructed with the state‐of‐the‐art RuO2‐PtC couple(applied potential difference of 1.55 V at 10 mA cm^-2).This work contributes a facile and reliable strategy for manufacturing affordable,practical,and promising water‐splitting devices.

Holey platinum nanotubes for ethanol electrochemical reforming in aqueous solution

The catalytic/electrocatalytic performance of platinum(Pt)nanostructures highly relates to their morphology.Herein,we propose a facile self-template pyrolysis strategy at high temperature to synthesize one-dimensionally holey Pt nanotubes(Pt-hNTs)using Pt^(Ⅱ)-dimethylglyoxime complex(Pt^(Ⅱ)-DMG)nanorods as the reaction precursor.The coordination capability of DMG results in the generation of Pt^(Ⅱ)-DMG nanorods,whereas the reducibility of DMG at high temperature leads to the reduction of Pt^(Ⅱ)species in Pt^(Ⅱ)-DMG nanorods.During the reaction process,the inside-out Ostwald ripening phenomenon leads to the hollow morphology of Pt-hNTs.Benefiting from the physical characteristics of hollow and holey structure,Pt-hNTs with clean surface show superior electroactivity and durability for catalyzing ethanol electrooxidation as well as hydrogen evolution reaction in alkaline media.Under optimized experimental conditions,the constructed symmetric Pt-hNTs||Pt-hNTs ethanol electrolyzer only requires an electrolysis voltage of 0.40 V to achieve the electrochemical hydrogen production,demonstrating a highly energy saving strategy relative to traditional water electrolysis.

A multiphase nickel iron sulfide hybrid electrode for highly active oxygen evolution

Development of highly active electrocatalysts for oxygen evolution reaction(OER)is one of the critical issues for water splitting,and most reported catalysts operate at overpotentials above 190 mV.Here we present a multiphase nickel iron sulfide(MPS)hybrid electrode with a hierarchical structure of iron doped NiS and Ni3S2,possessing a benchmark OER activity in alkaline media with a potential as low as 1.33 V(vs.reversible hydrogen electrode)to drive an OER current density of 10 mA cm^-2.The Fe doped NiS,combined with highly conductive disulfide phase on porous Ni foam,is believed to be responsible for the ultrahigh activity.Furthermore,density functional theory simulation reveals that partially oxidized sulfur sites in Fe doped NiS could dramatically lower the energy barrier for the rate-determining elementary reaction,thus contributing to the active oxygen evolution.

Decoupling hydrogen production from water oxidation by integrating a triphase interfacial bioelectrochemical cascade reaction

Water electrolysis to produce H2 is a promising strategy for generating a renewable fuel.However,the sluggish-kinetics and low value-added anodic oxygen evolution reaction(OER)restricts the overall energy conversion efficiency.Herein we report a strategy of boosting H_(2)production at low voltages by replacing OER with a bioelectrochemical cascade reaction at a triphase bioanode.In the presence of oxygen,oxidase enzymes can convert biomass into valuable products,and concurrently generate H_(2)O_(2) that can be further electrooxidized at the bioanode.Benefiting from the efficient oxidase kinetics at an oxygen-rich triphase bioanode and the more favorable thermodynamics of H_(2)O_(2)oxidation than that of OER,the cell voltage and energy consumption are reduced by~0.70 V and~36%,respectively,relative to regular water electrolysis.This leads to an efficient H_(2)production at the cathode and valuable product generation at the bioanode.Integration of a bioelectrochemical cascade into the water splitting process provides an energy-efficient and promising pathway for achieving a renewable fuel.