Erro Target Unreachable, identifier 'introducaoBean' resolved to null

Quando tento acessar minha página aparece esse erro:

INFORMAÇÕES: javax.el.PropertyNotFoundException: /documento/introducao/Nome.xhtml @21,80 value="#{introducaoBean.introducao.nome}": Target Unreachable, identifier 'introducaoBean' resolved to null javax.el.PropertyNotFoundException: /documento/introducao/Nome.xhtml @21,80 value="#{introducaoBean.introducao.nome}": Target Unreachable, identifier 'introducaoBean' resolved to null

página Nome.xhtml

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:p="http://primefaces.org/ui">


    <p:panelGrid id="painelNome" columns="1" style="width: 100%; margin-top: 20px">
        <p:outputLabel value="1) NOME:" for="iNome" />
        <p:inputText id="iNome" size="80" value="#{introducaoBean.introducao.nome}"/>
    </p:panelGrid>

</ui:composition>

classe IntroducaoBean

import java.io.Serializable;

import javax.faces.view.ViewScoped;
import javax.inject.Inject;
import javax.inject.Named;

import br.net.palm.docforsystem.models.Introducao;

@Named
@ViewScoped
public class IntroducaoBean implements Serializable{
    private static final long serialVersionUID = 1L;

    private Introducao introducao;

    public IntroducaoBean() {
        this.introducao = new Introducao();
    }    

    public void salvar() {
        System.out.println("Deu certo até aqui!!!");
    }


    public Introducao getIntroducao() {
        return introducao;
    }

    public void setIntroducao(Introducao introducao) {
        this.introducao = introducao;
    }    

}

classe Introducao

import java.io.Serializable;
import java.util.List;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.Size;

import org.hibernate.validator.constraints.NotBlank;

@Entity
@Table(name="introducao")
public class Introducao implements Serializable{
    private static final long serialVersionUID = 1L;
    private Long id;
    private String nome;

    @Id
    @GeneratedValue
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    @NotBlank(message = "Nome do software é obrigatório")
    @Size(max = 50)
    @Column(nullable = false, length = 50)
    public String getNome() {
        return nome;
    }
    public void setNome(String nome) {
        this.nome = nome;
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((id == null) ? 0 : id.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Introducao other = (Introducao) obj;
        if (id == null) {
            if (other.id != null)
                return false;
        } else if (!id.equals(other.id))
            return false;
        return true;
    }    
}