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Facets of Crises: How Problem Indicators and Public Perceptions Affect Policy Change
Policy Studies Journal, EarlyView.ABSTRACT Crises are widely acknowledged as catalysts for policy change. Yet, our understanding of the policy effects of crises remains limited. Why do only some crises lead to major changes, while significant policy changes also occur during seemingly non‐crisis periods?
Constantin Kaplaner +6 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2014 采用共沉淀结合乙醇超临界干燥方法，制备了不同铈锆比的CexZr1-xO2复合氧化物，采用浸渍法制备了负载Pd的催化剂，通过XRD、N2吸脱附、H2-TPR和静态储氧量测试等表征技术，考察了它们的结构性质、还原性能和储放氧性能，并将其应用于柴油机尾气可溶性有机物(SOF)的催化氧化反应中.结果表明，该铈锆复合氧化物具有圆柱形管状介孔结构，孔径分布范围较宽，具有较大的比表面积，因而有利于对SOF的吸附；锆的添加使铈锆复合氧化物体相氧向表面迁移的能力增强，进而提高了载体及其负载Pd催化剂的储氧量 ...
HANYuxi(韩玉惜) +1 more
doaj +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2003 采用离子交换法,将具有Keggin结构的磷钨酸、硅钨酸引入到Mg-Al、Mg-Al-Cu二元和三元的类水滑石(Hydrotalcite-like compounds,HTlcs)层间,成功制备了层有序度高,结晶度好的杂多酸阴离子水滑石,得到了通道高度达1.15 nm的大层间的催化材料,并用红外、XRD表征了材料的结构.测定了对NOx的吸附性能.
NIZhe-ming(倪哲明) +4 more
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Electrochemical carbon dioxide reduction reaction (CO2RR) powered by renewable electricity offers a sustainable route for producing value‐added carbonaceous chemicals. Herein, a three‐membrane electrolyzer was employed to directly co‐generate carbon monoxide (CO), chlorine (Cl2), and potassium carbonate (K2CO3) from the electrolysis of CO2 and
Shuai Wu +10 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2002 以Ce(NO3)3·6H2O和Zr(NO3)4·5H2O为原料,采用共沉淀法,合成了高比表面积的Ce-Zr-O复合氧化物.实验结果表明表面活性剂的添加量, 溶液的pH值及陈化时间等对比表面积的增加影响较大.当表面活性剂的添加量为70%, pH值为9.5, 陈化时间为120 h, 923 K焙烧2 h后, 样品的比表面积达到279.69 m2/g.FT-IR分析显示, 样品经923 K焙烧后,Ce-Zr-O上残留的活性剂已基本除去.
JIANGXiao-yuan(蒋晓原) +5 more
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Photocatalytic H2 evolution coupled with biomass upgrading offers a sustainable route for clean energy conversion and high‐value chemical synthesis. Herein, an in situ grown S‐scheme MnS/MnB‐MBene heterojunction (denoted as SMx) was fabricated via alkaline etching of Mn2AlB2 followed by controlled sulfurization.
Pei Li +7 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2009 过渡金属（Mn、Fe、Ni、Zn、Co）修饰对铜铈催化剂的催化性能有明显的影响.Fe和Co的修饰对铜铈催化剂的CO氧化活性有较明显的促进作用,在110 ℃时,CO的转化率即达到99%；尤其Co的修饰增加了铜铈催化剂上CO转化率为99%的温度‘窗口’宽度约30 ℃,而Mn、Ni和Zn的修饰对铜铈催化剂的CO氧化活性则有一定的抑制作用.但不同过渡金属修饰对铜铈催化剂的氧化选择性均有明显的提高.
LIUZhi-gang(刘志刚) +2 more
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Vanadium‐bearing solid wastes (VBSWs) have emerged as a key research priority in resource recovery and environmental remediation because of their high resource value, large generation volume, and complex phase composition. However, practical utilization of these wastes still faces major challenges, including heavy environmental burdens, ill ...
Bowen Duan +7 more
wiley +1 more source
Effect of fuels on the nanosized ceria powder by combustion method(燃烧剂对燃烧法合成CeO2纳米粉体的影响)
Zhejiang Daxue xuebao. Lixue ban, 2009 通过燃料-硝酸盐低温燃烧法合成了纳米二氧化铈粉体.考察了新型燃烧剂甘油和甘露醇对二氧化铈纳米粉体的影响,通过TG-DTA对凝胶的分解特性进行了分析,并利用XRD、氮气吸脱附和SEM对粉体的性能进行了表征.结果表明：使用甘露醇制备的CeO2晶粒较小(10.1 nm),比表面积较大（87.1 m2 •g-1）.
WUHong-miao(吴红苗) +6 more
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Electrosynthesis of hydrogen peroxide (H2O2) via the two‐electron oxygen reduction reaction (2e−ORR) offers a sustainable and decentralized alternative to the anthraquinone process. However, conventional solo‐active‐site catalysts are intrinsically limited by scaling relationships, imposing a trade‐off between activity and selectivity.
Yiqi Ding +12 more
wiley +1 more source